pdfroff --version (return code: 0)
GNU pdfroff (groff) version 1.22.3 GNU groff version 1.22.3 Copyright (C) 2014 Free Software Foundation, Inc. GNU groff comes with ABSOLUTELY NO WARRANTY. You may redistribute copies of groff and its subprograms under the terms of the GNU General Public License. For more information about these matters, see the file named COPYING. called subprograms: GNU grops (groff) version 1.22.3 GNU troff (groff) version 1.22.3
pdfroff --help (return code: 0)
Usage: pdfroff [-option ...] [--long-option ...] [file ...] Options: -h --help Display this usage summary, and exit. -v --version Display a version identification message and exit. --report-progress Enable console messages, indicating the progress of the PDF document formatting process. --emit-ps Emit PostScript output instead of PDF; this may be useful when the ultimate PDF output is to be generated by a more specialised postprocessor, (e.g. gpresent), rather than the default GhostScript PDF writer. --pdf-output=name Write the PDF, (or PostScript), output stream to file 'name'; if this option is unspecified, standard output is used for PDF, (or PostScript), output. --no-pdf-output Suppress the generation of PDF, (or PostScript), output entirely; use this with the --reference-dictionary option, if processing a document stream to produce only a reference dictionary. --no-reference-dictionary Suppress the generation of a 'pdfroff' reference dictionary for the PDF document. Normally 'pdfroff' will create a reference dictionary, at the start of document processing; this option can accelerate processing, if it is known in advance, that no reference dictionary is required. --reference-dictionary=name Save the document reference dictionary in file 'name'. If 'name' already exists, when processing commences, it will be used as the base case, from which the updated dictionary will be derived. If this option is not used, then the reference dictionary, created during the normal execution of 'pdfroff', will be deleted on completion of document processing. --stylesheet=name Use the file 'name' as a 'groff' style sheet, to control the appearance of the document's front cover section. If this option is not specified, then no special formatting is applied, to create a front cover section. --no-toc-relocation Suppress the multiple pass 'groff' processing, which is normally required to position the table of contents at the start of a PDF document. --no-kill-null-pages Suppress the 'null page' elimination filter, which is used to remove the excess blank pages produced by the collation algorithm used for 'toc-relocation'. --keep-temporary-files Suppress the normal clean up of temporary files, which is scheduled when 'pdfroff' completes.